101556043539 has 16 divisors (see below), whose sum is σ = 135991581312. Its totient is φ = 67412749248.

The previous prime is 101556043517. The next prime is 101556043591. The reversal of 101556043539 is 935340655101.

It is not a de Polignac number, because 101556043539 - 2¹¹ = 101556041491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101556043539.

It is not an unprimeable number, because it can be changed into a prime (101556043139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792052 + ... + 911294.

It is an arithmetic number, because the mean of its divisors is an integer number (8499473832).

Almost surely, 2^101556043539 is an apocalyptic number.

101556043539 is a deficient number, since it is larger than the sum of its proper divisors (34435537773).

101556043539 is a wasteful number, since it uses less digits than its factorization.

101556043539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120466.

The product of its (nonzero) digits is 243000, while the sum is 42.

The spelling of 101556043539 in words is "one hundred one billion, five hundred fifty-six million, forty-three thousand, five hundred thirty-nine".